What is the probability that the product of two integers ( not necessarily different integers ) randomly selected from the numbers 1 through 20, inclusive , is odd ?

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Satt Academy · Accepted Answer

1/4 - Total integers; 20 
even  =  odd  =  10 
Since odd x odd  =  odd and since half the integers 1 to 20 are odd, the probability of selecting two odd integers is 1/2 x 1/2  =  1/4.

What is the probability that the product of two integers ( not necessarily different integers ) randomly selected from the numbers 1 through 20, inclusive , is odd ?

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